use function to check for end of link

lib/marked.js

@@ -571,7 +571,7 @@ inline.tag = edit(inline.tag)
   .getRegex();
 
 inline._label = /(?:\[[^\[\]]*\]|\\[\[\]]?|`[^`]*`|[^\[\]\\])*?/;
-inline._href = /\s*(<(?:\\[<>]?|[^\s<>\\])*>|(?:\\[()]?|\([^\s\x00-\x1f\\()]*\)|[^\s\x00-\x1f()\\])*?)/;
+inline._href = /\s*(<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*)/;
 inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
 
 inline.link = edit(inline.link)
@@ -719,6 +719,12 @@ InlineLexer.prototype.output = function(src) {
 
     // link
     if (cap = this.rules.link.exec(src)) {
+      var lastParenIndex = findClosingBracket(cap[2], '()');
+      if (lastParenIndex > -1) {
+        var removeChars = cap[2].length - lastParenIndex;
+        cap[2] = cap[2].substring(0, lastParenIndex);
+        cap[0] = cap[0].substring(0, cap[0].length - removeChars);
+      }
       src = src.substring(cap[0].length);
       this.inLink = true;
       href = cap[2];
@@ -1503,6 +1509,27 @@ function rtrim(str, c, invert) {
   return str.substr(0, str.length - suffLen);
 }
 
+function findClosingBracket(str, b) {
+  if (str.indexOf(b[1]) === -1) {
+    return -1;
+  }
+  var level = 0;
+  for (var i = 0; i < str.length; i++) {
+    if (str[i] === '\\') {
+      i++;
+    } else if (str[i] === b[0]) {
+      level++;
+      continue;
+    } else if (str[i] === b[1]) {
+      level--;
+      if (level < 0) {
+        return i;
+      }
+    }
+  }
+  return -1;
+}
+
 /**
  * Marked
  */

test/specs/commonmark/commonmark-spec.js

@@ -352,7 +352,7 @@ describe('CommonMark 0.28 Links', function() {
   var section = 'Links';
 
   // var shouldPassButFails = [];
-  var shouldPassButFails = [468, 474, 478, 483, 489, 490, 491, 495, 496, 497, 499, 503, 504, 507, 508, 509];
+  var shouldPassButFails = [474, 478, 483, 489, 490, 491, 495, 496, 497, 499, 503, 504, 507, 508, 509];
 
   var willNotBeAttemptedByCoreTeam = [];